diff --git a/backend/utils/timezone.py b/backend/utils/timezone.py
index 30fdbafa..8a387e1b 100644
--- a/backend/utils/timezone.py
+++ b/backend/utils/timezone.py
@@ -5,11 +5,17 @@ from datetime import timezone as datetime_timezone
 
 from backend.core.conf import settings
 
+# 基于 wikipedia：https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List
+_UTC_IDENTIFIERS = frozenset({'Etc/UCT', 'Etc/Universal', 'Etc/UTC', 'Etc/Zulu', 'UCT', 'Universal', 'UTC', 'Zulu'})
+
 
 class TimeZone:
     def __init__(self) -> None:
         """初始化时区转换器"""
-        self.tz_info = zoneinfo.ZoneInfo(settings.DATETIME_TIMEZONE)
+        if settings.DATETIME_TIMEZONE in _UTC_IDENTIFIERS:
+            self.tz_info = datetime_timezone.utc
+        else:
+            self.tz_info = zoneinfo.ZoneInfo(settings.DATETIME_TIMEZONE)
 
     def now(self) -> datetime:
         """获取当前时区时间"""